Stoker



' Oct. 23, 1934.

A 1,978,063 c. J. SURDYKOWSKI, NOW BY JUDICIAL CHANGE OF NAME c. J. SURDY STOKER Filed Sept.

- INVENTOR. fifima JSzzmja/rwdfi ATTORNEY.

Patented Oct. 23, 1934 .STOKER Charles J. Surdykowski, Tuckahoe, N. Y., now by judicial change of name Charles J. Surdy, assignor to The Standard Stoker Company, Incorporated, a corporation of Delaware Application September 9, 1931, Serial No. 561,822

Claims. (01.110-101) Thisinvention relates .to stokers of the scatter (feed type, and. more particularly to the elevating and distributing mechanism thereof.

Theuchief object-of the invention is the provision of a reciprocating elevator or fuel lifter acting between a source of fuel supply and the stoker distributing'means to raise fuel from the former onto the latter.

More specific objects of the invention reside in the novel elevator and in its relation with associated parts. (Onthedrawing v t Figure 1 is a vertical section through the rear portion of a locomotive and the forepart of its tender, with the stokerin position therein, some portions of the stoker beingbroken away; and

Figure2 is a plan viewof the stoker shown inFigure 1. I

Referring tothe drawing, designates the locomotive, 11 the backhead thereof and 12 the firing opening. The" tender isshown at 13. The stoker of this invention is generally indicated by theletter S and comprises the transfer conduit 14, consisting of the rearward trough portion 15 positioned" beneath the floor16 of the tender to receive fuel from the coal bin thereof and the flexlibly mounted extensible and contractible tubular conduit member 17,: and the elevator casing 18 which at its mouthportion 19 opens into the firing opening 12 and at its lower and rearwardly disposed end portioncarries afuel chamber or casing 20 receiving fuel from the forward end of the transfer conveyor 14 wherein the fuel is advanced by the screw 21. For convenience of description the term forward is employed to denote the general direction in which fuel moves through the stoker into the'firebox.

A fuel distributing means is mounted in the mouth portion 19 of the elevator casing for projecting the fuel through the firing opening 12 into the fire box 22. This means includes a distributor plate 23 horizontally positioned in the firing opening 12 and at its rearward end being fixed to the elevator casing 13 in any suitable manner and a distributor head 24 disposed vertically in the mouth portion of the elevator casing at the rear of the distributor plate. The head 24 extends above the level of the plate 23 and the extended portion is provided with any suitable number of jet openings 25 communicating with one or more pressure fluid supply lines as at 26 for discharging a blast of pressure fluid such as air or steam forwardly across the distributor plate 23 acting to propel fuel therefrom.

The fuel is raised from the chamber 20 onto the distributing means by a reciprocatory elevator or lifter 27 mounted within the casing 18, a portion of which forms-a guide for the elevator. The elevator is interposed between the fuel chamber or casing 20 and the distributor head 24, and is inclined forwardly and upwardly from the former to the latter. Reciprocating motion is imparted to the elevator or lifter 27 from a motor 28 through the motor shaft 29 on whichis mounted the worm 3D engaging the worm wheel 5 31, the shaft 32 of which worm wheel 31 carries the crank arm 33 which is pivotally connected to the connecting rod 34 which in turn is pivotally connected at its upper end to the elevator 27. The aforesaid drive mechanism isarranged to move the fuel carrying surfaces or face plate 35 of the elevator 2'? during its upward stroke, as shown, to a point beyond the upper end of the front wall 36 of the casing 18 and above the level of the distributor head 24 and the plate 23. On the 7' downward stroke of theelevator 27 its surface 35 is brought to a point adjacent the ledge 37 of the elevator casing;

It is an important feature of this invention that the fuel carrying surface or face plate 35 of the elevator must be inclined rearwardly and upwardly with respect to the distributor head 24 at *an angle with the horizontal greater than the angle of repose of the fuel.

Preferably, it is desired to continuously supply fuel to the chamber 20 regardless of the position of .theelevator 27. For this purpose continuous rotary motion is imparted to the screw 21 of the transfer conveyor 14 from the motor 28 through worm gearing at 38 driving the shaft 39 which as gf is well known in the art transmits motion to gearing, not shown, at the rearward end of the screw. Hence, in operation of the structure heretofore described fuel is conveyed from the tender 13 by the screw 21 through the transfer conduit 14 into 3 the fuel chamber 20 where the fuel moves upwardly and forwardly onto the fuel carrying surface 35 as the elevator 27 moves downwardly, and on the upstroke of the elevator 27 the fuel on the top surface or face plate 35 of the elevator is 11m held thereon by the guide walls of the casing 13 until the face plate 35 moves beyond the upper end of the casing wall 36 when the fuel will fall 7 downwardly and forwardly onto the distributor plate 23 within the zone of action of the blast is- 6 suing from the head 24 by reason of the angle of inclination of the faceplate being greater than the angle of repose of the fuel.

The essence of the invention in its broader aspects is the provision of a reciprocatory fuel lifter 5 n between a source of fuel supply and a distributing means acting of itself independent of any other mechanism to raise fuel from the source of supply above the fuel distributing means and delivering the same therefrom onto the distributing means. Various modifications of the invention are contemplated within the scope of the appended claims.

I claim:

1. In a stoker, a distributor plate, a distributor head arranged to discharge a blast of pressure fluid forwardly over said plate, a conveyor disposed rearward of and in a plane below said head for advancing fuel from a source of supply toward the head, a casing communicating with said conveyor and extending between said distributor head and said conveyor, and a single reciprocatory elevator in said casing interposed between said conveyor and said head receiving fuel from the former and raising it to a point above the latter by a single upward movement, the fuel carrying surface of said elevator. when in its uppermost position being inclined at such an angle that fuel falls downwardly by gravity over said head onto said distributing plate within the zone of action of the pressure fluid blast.

2. In a stoker, a distributing means, a fuel chamber, disposed below and rearward of said means, a forwardly and upwardly inclined casing communicating with said chamber and extending between said chamber and said distributing means, the forward wall of said casing at its upper end terminating adjacent and above said means, a reciprocatory elevator mounted in said casing receiving fuel from said chamber, and means for imparting reciprocating motion to said elevator moving the same during its upward stroke to extend beyond the upper end of the said forward wall of the casing, the fuel carrying surface of said elevator being rearwardly and upwardly inclined at an angle greater than the angle of repose of the fuel thereon whereby the fuel falls downwardly therefrom onto said distributing means as the elevator moves beyond the upper end of said forward wall of the casing.

3. In a stoker, a distributing means, a fuel chamber disposed below and rearward of said means, a casing between said chamber and said means and a reciprocating elevator disposed therein, and mechanism for imparting reciprocating motion to said elevator moving it to its lowermost position on one stroke to receive fuel from said chamber and to its uppermost position on the other stroke to raise the fuel to a point above the level of the forward wall of said casing and said distributing means, the fuel carrying surface of said elevator being inclined rearwardly and upwardly at an angle greater than the angle of repose of the fuel thereon whereby the fuel falls downwardly and forwardly therefrom over said casing forward wall onto said distributing means as the elevator raises the fuel above the level of said wall and distributing means during its upward stroke.

4. In a stoker, a distributing means, a fuel chamber disposed below and rearward of said means, a casing communicating with said chamber and extending between said chamber and said distributing means, and a single fuel lifter movably mounted in said casing, said lifter in one extremity of its path receiving fuel from said chamber and in the other extremity of its path raising the fuel to a point above the forward wall of said casing and above said distributing means, the fuel carrying surface of said lifter in said last named phase being rearwardly and upwardly inclined at an angle greater than the angle of re pose of the fuel thereon whereby the fuel falls downwardly therefrom onto said distributing means as it is raised beyond the upper end of said forward wall of the casing, said lifter being arranged to form a closure for said chamber when in the last named extremity of its path.

5. In a stoker, a distributor member, distributing means for projecting fuel from said member, a conveyor disposed in a plane below said distributor member for advancing fuel from a source of supply toward said member, a forwardly and upwardly inclined casing interposed between said conveyor and said member, and a reciprocating elevator mounted in said casing, said elevator being arranged to receive fuel from said conveyor in one extreme position of its path, the fuel carrying surface of said elevator being inclined rearwardly and upwardly at an angle greater than the angle of repose of the fuel thereon whereby the fuel will fall by gravity onto said distributor plate into the zone of action of said distributing means in the other extreme position of the path of said elevator, said elevator being arranged to form a closure for said conveyor in its said last named position.

CHARLES J. SURDYKOWSKI.

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